Tool holder



Feb. 28, 1933. TYLER 1,899,169

TOOL HOLDER Filed Oct. 24, 1928 Patented Feb. 28;;1933:

7 mELvni-in TYLER, or BALTIMORE; MARYLAND moor. nornrm f Application. filedfoctober '24, 11928. Serial No.d314,646.

Thisinvention relates to an improvement in tool holders and tools, and particularly to- I that type used in re-facing valve seats in in ternal combustion motors. However it is not limited to that class of work but may also beused in re-facing seats 'of val ves such as steam, water, and gas valvesgi i v An object of-jthis inven ion is top'rovide a holder in which a number ,officuttingtools may beheld by means of a single clamp and locked by a single nut. I

, Another ob 'ectofth1s invention is topro' vide a tool, holder simple to adjust, thatzat the same time will hold tools rigidly in p'lace.-

It is ell'known that frequentlya tool will leave a wave formed cut surface; This results from a twisting and sudden release of the bit shank asthe tool bites into the metal and suddenly releases.,.'l his result is avoided in the instant invention. by mounting a plu-.

rality' of: cutting tools, spaced 'circumferene tially from' 'one'anotherby unequal angular 'ing views, of which:

of Fig. 2.

distances.

" The'inventionis illustrated in-the follow- Fig. l is a side elevation showing ,the

clamping holder ready to beslid intoplace,

Fig. 2 is aview of the slidable holder. 1 Fig. 3 is a bottom view of the holder; slide device,.l is a main support which is provided with an annular flange 3 on whloh the cuttlng tools7 are assembled." As shown in Fig. 1

and Fig. the upper surface'of the flange has a flat portion 5 which merges into an upwardly extending cam section 6. 'An annular V groove 4 is; formed 1n the approximate center showsthe holder and tools fully assembled.

- Fig. 5 shows atop viewof the .fia'nge on 'g view of. the holder ofFig. 2.

of 5 although the precise position of the groove'is a matter that will dependon tool dimensions and .isn'ot considered apart: of 1 the invent-ion.

ing of the cutters, as shown in Fig. 6. In

assembled positionthe lugs take into groove 4, see. Fig. 4. The'cutting tool is shown in F ig. 7 in" a side'view. The edge abutting the stem 1 is curved to fit it as shown in Fig. 8,. at 18; "By'this' construction a broad bearing I contact is secured between the cutter and the 7 pilot stein. This holds the cutter more firmly against the stem. with less setting down of thehut 13 and clamp 2. v The cutter is'for med with a calm extension 7a which co-operates with'cam. surface8. *The lower faceof the cutter has a flat portion .16, and adjacent. thereto cam section 19. v

mately an angle of 45 degrees. However the.

precise angular form will be determined by; the particular kindof work to'bedone.

;T he cutters are assembled on-the'flange 3 as shown in Figs. 1 and 6 and the clampsleeve is slid onjl so that't'he lugs take over the cu't-'- ters, and the ends of. thelugs 10; seat in roove, 4. Lock nut 13'is' then screweddown on the threaded end ofl thus firmly holding 2 in place. The inner cam face 8 engaging 8 camsi'a'on the cutters and the co-action of cams 19 with camsurface 6"of flange 3 force tlie'cutters" radially 'against l and hold them rigidly ,inworking position. As a further precautionfto pre -ient any displacement of the cutters, surfaces 5, 16', 6 and 19 are niilled 'see Figs. 1',' 5, 6,-and 8. This milling is approximately radial to permit the radialdisplacement of the cutters when theslide 2 isforcedhome. 7 r

It will'be noted in 'Fig.,Y9 that the upper end of the clamp is formed as at 11 to permit the assembled tool to be turned. in the cutting operation, by any'suitable' wrench or other apa propriat'e'instrument; The fiange9 on mem- 9 Slidable onmeniber 1 is clamping sleeve 2 55 i i I 1. A valve seat-fa cing tool holder, comprising a pilot stem carrying an annular ledge, a

member axially displaceable on said stem said member having one end slotted to form tongues, said ledge also being formed so that it may have interfitting engagement with said tongues. v

A valve seat l e-facing tool holder, comprising a pilot stenihaving an annular ledge formed on one face with an annular groove and an adjacent cam surface, a member displaceable on said stem, said member being formed with an internal conical cam face,- and alsoformed on one end with tongues for interiitting engagement with said groove in said ledge.

3. In a re-facing tool, in combination, a pilot stem carrying a ledge formed with a groove in its end face, a member axially displacoable on said stem, and slotted at the end adjacent said ledge to form tongues, cutting means mounted on said ledge snugly between said tongues and extending outwardly in a radical direction from said stem, said tongues engaging snugly in said groove and held thereby against outward spreading.

4,. In a valve seat re-facing tool, a pilot stem carryin an annular ledge having a cam surface on its top face, a clamping member slidable on said stem and formed interiorly with a substantially conical surface, cutting blades mounted on said ledge and having beveled projections on opposite edges, said projections, conical surface, and cam surface all co-operating to force said cutters into firm engagement with said stem.

5. In a valve seat re-facing tool, a pilot stem, an annular ledge thereon having an annular groove and an adjacent cam face, a clamping member slidable on said stem and formed with an internal cam surface and slotted on one end to form tongues, cutting blades mounted on said ledge and between said tongues and formed with cam projections, said camface, cam surface, and projections co operating to force said blades against said stem, and said tongues engaging in said groove to hold said cutters against lateral displacement.

6. A valve seat re-facing tool, comprising a pilot stem having thereon an annular ledge, a clamp member slidable on said stem, cutting blades mounted on said ledge, said clamp being formed on one end with tongues between which the blades are positioned, said faces they will be slidablyforced into firm contact with said'stem.

8. A valve seat refacing tool comprising a pilot stem havingthereon an annular ledge,

a. clamp member slidable on said stem, a cutting blade inounted on said ledge, said clamp member at the end approaching said ledge being spaced from said stem to provide an annular channel, the inner end of said channel being entirely convergent away from said ledge to provide an annular bevel cam face, the end of said clamp member around said channel being slotted endwise and radially, a blade disposed in said slot and extending radially from said clamp member, said ledge having a wall portion overrunning the slotted end of sa'id clamp member and holding it against outward spreading, said blade hav ing atongue adjacent its inner end, and beveled for engagement wlth said annular cam face 1n a manner to cam said blade endwise of itself toward said axis and against said stem, upon approach of said clamp member toward said ledge to clamp said blade between them. j

In testimony whereof I affix my signature.

MELVIN E. TYLER. 

